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authorChristoph Lameter <clameter@engr.sgi.com>2007-03-05 03:30:33 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-05 10:57:51 -0500
commit0dc952dc3e6d96d554a19fa7bee3f3b1d55e3cff (patch)
tree1dcf2ff93784716143b7acef816888a71a9504c2 /mm/mempolicy.c
parent1f2b69f9bdce8461341e5fb864568a2ee90079c8 (diff)
[PATCH] Page migration: Fix vma flag checking
Currently we do not check for vma flags if sys_move_pages is called to move individual pages. If sys_migrate_pages is called to move pages then we check for vm_flags that indicate a non migratable vma but that still includes VM_LOCKED and we can migrate mlocked pages. Extract the vma_migratable check from mm/mempolicy.c, fix it and put it into migrate.h so that is can be used from both locations. Problem was spotted by Lee Schermerhorn Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mempolicy.c')
-rw-r--r--mm/mempolicy.c9
1 files changed, 0 insertions, 9 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index cf2a5381030a..d76e8eb342d0 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -321,15 +321,6 @@ static inline int check_pgd_range(struct vm_area_struct *vma,
321 return 0; 321 return 0;
322} 322}
323 323
324/* Check if a vma is migratable */
325static inline int vma_migratable(struct vm_area_struct *vma)
326{
327 if (vma->vm_flags & (
328 VM_LOCKED|VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED))
329 return 0;
330 return 1;
331}
332
333/* 324/*
334 * Check if all pages in a range are on a set of nodes. 325 * Check if all pages in a range are on a set of nodes.
335 * If pagelist != NULL then isolate pages from the LRU and 326 * If pagelist != NULL then isolate pages from the LRU and